超细WC-Co复合粉制备及快速烧结技术研究进展

Review in Synthesis of Ultrafine WC-Co Composite Powder and Rapid Sintering Technique

超细WC-Co复合粉是制备高性能超细/纳米晶硬质合金的重要原料之一,近年来发展了多种复合粉的制备技术。本文综述了其中的喷雾转换工艺法、化学沉淀法、原位还原碳化法、化学气相反应合成法和机械合金化法的研究和应用状况。同时简要介绍了一些新型的快速烧结技术的原理,以及这些新型的快速烧结技术制备的超细/纳米晶硬质合金上的研究进展,并对快速烧结技术在硬质合金领域发展前景进行了分析。

Ultrafine WC-Co composite powder is one of the crucial material for preparing high performance ultrafine/ nanocrystalline cemented carbide. In this review, the research and application of spray conversion process, chemical co- precipitation, in-situ reduction and carbonization, chemical vapor phase reaction and mechanical alloying methods are commented. The recent progress and principles of the novel rapid sintering technique for preparing ultrafinad nanocrystalline cemented carbide are discussed. The prospect of rapid sinering technique on cemented carbide is analyzed.